It was widely believed that acute hunger would always undermine prosociality; these authors think it is not so

Acute hunger does not always undermine prosociality. Jan A. Häusser, Christina Stahlecker, Andreas Mojzisch, Johannes Leder, Paul A. M. Van Lange & Nadira S. Faber. Nature Communications volume 10, Article number: 4733 (2019), October 18 2019. https://www.nature.com/articles/s41467-019-12579-7

Abstract: It has been argued that, when they are acutely hungry, people act in self-protective ways by keeping resources to themselves rather than sharing them. In four studies, using experimental, quasi-experimental, and correlational designs (total N = 795), we examine the effects of acute hunger on prosociality in a wide variety of non-interdependent tasks (e.g. dictator game) and interdependent tasks (e.g. public goods games). While our procedures successfully increase subjective hunger and decrease blood glucose, we do not find significant effects of hunger on prosociality. This is true for both decisions incentivized with money and with food. Meta-analysis across all tasks reveals a very small effect of hunger on prosociality in non-interdependent tasks (d = 0.108), and a non-significant effect in interdependent tasks (d = −0.076). In study five (N = 197), we show that, in stark contrast to our empirical findings, people hold strong lay theories that hunger undermines prosociality.